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Kiefer wrist weights
The universal fitting weights, which fasten quickly and easily around the wrist or ankle to add an extra dimension for water exercises.
Approximately 0.395kg per weight.
Adolph Kiefer was an American swimmer and the first man in the world to swim 100 yards backstroke under 1 minute. His backstroke records stood for 15 years. Kiefer established Adolph Kiefer & Associates in Chicago, which has been providing swimmers with training and safety equipment ever since. His company was responsible for the development of the Nylon Tank Suit in 1948, a marked improvement over the wool and cotton suits available at the time.